It is possible to change the accessibility icon shape. All you need to do is follow the steps below:
Go to the "Widget Settings".
Scroll down until you reach the "Clickable Trigger Settings".
Here, you can change the following:
Icon Size
Small
Medium
Large
Icon Shape
Circle
Square
Icon Image
Don't forget to save your changes!
Keywords:
How can I change the shape or icon of the accessibility button?
Where can I find the settings to customize the accessibility button's shape or icon?
What are the steps to change the accessibility button shape or icon?

